Yang Fei, Patterson Robert P
The Bakken Medical Instrumentation and Devices (MIND) Laboratory, Biomedical Engineering Institute, University of Minnesota, 420 Delaware St, MMC 297, Minneapolis, MN 55455, USA.
Physiol Meas. 2007 Jul;28(7):S153-61. doi: 10.1088/0967-3334/28/7/S12. Epub 2007 Jun 26.
A high resolution electrical finite difference model of the human thorax based on a 43 slice MRI data set along with lead field theory was used to examine the contribution of the lungs to the total impedance for a typical mid-thoracic 2D EIT eight and sixteen electrode configuration. Regional analysis of the thoracic sources of impedance revealed that the maximum contribution of lungs to the total impedance was approximately 22% for the eight electrode array and 25% for the sixteen electrode array. Analysis of impedance distribution of the lungs using a mid-thoracic application showed that the contribution of impedance of each slice followed closely the volume of the lungs in the given slice. This suggests that the mid-thoracic application gives results reflecting the entire lung. The contributions of the lung impedance for the various electrode positions showed that the eight electrode configuration had a more smooth change between adjacent electrodes compared to the 16 electrode arrangement.
基于43层MRI数据集和导联场理论建立的人体胸部高分辨率电有限差分模型，用于研究典型中胸部二维电阻抗断层成像（EIT）八电极和十六电极配置下肺部对总阻抗的贡献。对胸部阻抗源的区域分析表明，对于八电极阵列，肺部对总阻抗的最大贡献约为22%，对于十六电极阵列则为25%。使用中胸部应用对肺部阻抗分布进行分析表明，每个切片的阻抗贡献与给定切片中肺部的体积密切相关。这表明中胸部应用给出的结果反映了整个肺部。肺部阻抗对不同电极位置的贡献表明，与十六电极配置相比，八电极配置在相邻电极之间的变化更为平滑。
